Arbor-vitae is composed of
grey matter
neurogleal cells
white matter
all of the the above
A.
grey matter
The arbor vitae (Latin for "tree of life") is the cerebellar white matter, so called for its branched, tree-like appearance. In some ways it more resembles a fern and is present in both cerebellar hemispheres. It brings sensory and motor information to and from the cerebellum.
In cerebellum strips of white matter profusely ramify into the folds of grey matter. This system of branched strips of white matter within each cerebellar hemisphere is called Arbor-vitae".
Sensory receptor of warmth located principally at the tip of fingers is known as :
Weber's organ
organ of Giraldes
Ruffini's corpuscles
organ of Zuckerkandl
In the myopia eye defect, the rays of light :
do not enter the eye at all
meet at a focus in front of the retina
come to a focus at back of retina
come to a focus in between retina and iris
The unidirectional transmission of a nerve impulse through nerve fibre is due to :
neurotransmitters are released by axon endings
neurotransmitters which are released by dendrites
nerve fibre which is insulated by a medullary sheath
sodium pump which starts operating into the nerve fibre
Which of the following part of human brain is associated with integration of sympathetic and parasympathetic activities ?
Cerebrum
Neopallium
Hypothalamus
Medulla oblongata
